Honestly id go for a dedicated target scope (lots of great mentions)for your tikka tac, and then id grab a dedicated lightweight hunting rifle/scope combo.
Unless you're in a blind or sitting in one spot...a heavy gun gets real old real fast. If your truck hunting then weight doesnt matter really...i find that i tend to walk farther and farther away from the truck
My t3x ctr/mdt chassis in 308 has a viper pst gen2 5-25 on top and my hunting rifle is a browning x bolt pro in 6.5prc, has a razor lht 3-15x42 on top.